[Bug rtl-optimization/127798] hypot builtin is incorrect on (DBL_SNAN, 0.0) for C

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127798

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2026-10-11
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
           Keywords|                            |wrong-code
          Component|middle-end                  |rtl-optimization

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.  I see we expand from

  c_6 =  Nan;
  d_8 = hypot (c_6,  Inf);

so we likely constant fold sth wrong on the RTL side.